<template>
  <!-- 头部部分 -->
  <header class="header">
    <h1>todos</h1>
    <input  
    v-model.trim="name"
    @keyup.enter="fn"
     @keyup.esc="name=''"
    class="new-todo" placeholder="请输入任务名称" autofocus />
  </header>
</template>

<script>
export default {
  data () {
    return {
      name:''
    }
  },
  methods: {
    fn(){
      if(this.name==='')return alert('输入内容不能为空')
      this.$emit('dealadd',this.name)
      this.name=''
    }
  }
}
</script>

<style></style>
